Defi Jobs in California, United States

Job Title- Senior Blockchain Engineer

Project Location – Fully onsite in Irvine or Mountain View, CA

Duration- 3-6 months contract to hire

Visa- USC

Project Description: Senior Blockchain Engineer will architect and implement the blockchain foundation of the BioMatrix.ai ecosystem. They will design secure, scalable, and user-friendly blockchain solutions that integrate biometric identity, payments, and data services.

This is a hands-on engineering role for someone who has deep blockchain expertise, thrives in 0→1 innovation, and is motivated to build real-world applications at global scale. Will work on upcoming projects around Real World Assets (RWA).

Duties/Day to Day Overview

•Go-to Blockchain expert

•70% coding/30% cross-functional work providing guidance to Product Managers and Marketing teams on technical feasibility

•Will be involved in new product design with Marketing team

•Meeting with end customers (5 hours/week)

•Will work with team in China (unsure what hours but will allow flexibility for start times)

(Must haves)

•Layer 2 Blockchain Experience

•Proficiency in Java (any version)

•Real World Assets (RWA – tough find)

•Bachelor’s or Master’s degree in Computer Science, Cryptography, or related technical field.

•5+ years of blockchain development experience (protocol, dApps, Layer 1/Layer 2, or DeFi/Web3).

•Proficiency in Java and Solidity.

•Strong understanding of smart contract security, cryptography, and distributed systems.

•Experience with Ethereum, Solana, or other major blockchain platforms.

•Proven track record of delivering production-grade blockchain systems.

•Excellent problem-solving, collaboration, and communication skills.